Class 23

The Class 23 may refer to:

• British Type 2 Class 23 "Baby Deltic" passenger locomotives built by English Electric with Napier Deltic engines
• German express train, tender locomotives with a 2-6-2 wheel arrangement operated by the DRG, DB and DR:
  • The DRG's pre-war, standard, steam locomotive (Einheitslokomotive): DRG Class 23
  • The DB's post-war (Neubaulokomotive): DB Class 23
  • The DR's post-war Neubaulokomotive in East Germany: DR Class 23.10